Enjoy high fidelity sound quality while remaining connected to the outside world with the Koss KSC21 sport clip headphones. These over-the-ear headphones deliver a wide-range, extended frequency response through soft, foam ear cushions that guarantee an open, hear-through sound. When you choose the KSC21, you're rewarded with the comfort of pivoting ear plates, and the great, crisp and clean Sound of Koss.